wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Semester 2 Final Review

Total questions: 108

Worksheet time: 2hrs 6mins

Name
Class
Date
1.

a)

A

b)

B

c)

C

d)

D

2.

a)

A

b)

B

c)

C

d)

D

3.

a)

A

b)

B

c)

C

d)

D

4.

a)

A

b)

B

c)

C

d)

D

5.

a)

A

b)

B

c)

C

d)

D

e)

E

6.

a)

A

b)

B

c)

C

d)

D

7.

a)

A

b)

B

c)

C

d)

D

8.

a)

A

b)

B

c)

C

d)

D

9.

What are the two factors that affect the momentum of an object?

a)

speed and velocity

b)

time and mass

c)

distance and displacement

d)

mass and velocity

10.
When the speed of an object is doubled, its momentum
a)
remains unchanged in accord with the conservation of momentum.
b)
doubles
c)
quadruples
d)
decreases
11.
Which object has the greatest momentum?
a)
An 18-wheeler tractor trailer at rest.
b)
An average mass person walking.
c)
A sports car driving on the highway.
12.

Momentum is a ____________________ quantity

a)

science

b)

scalar

c)

vector

d)

energy

13.

T/F: A big truck will always have more momentum than a small car.

a)

True

b)

False

14.

The Law of Conservation of Momentum states:

a)

The total momentum before a collision is equal to the total momentum after a collision.

b)

The total momentum before a collision is greater than the total momentum after a collision.

c)

The total momentum before a collision is less than the total momentum after a collision.

d)

The total momentum before a collision is not related to the total momentum after a collision.

15.

A Russian cosmonaut(87 kg) and USA astronaut(94 kg) are outside the ISS and decide to run a momentum experiment. They are motionless facing each other palm to palm, then push apart from each other. What happens to their momentum?

a)

their total momentum doubles

b)

their total momentum decreases

c)

the guy with the smaller mass has less momentum

d)

their momenta are opposite but equal

16.

A rail car with a nonzero velocity, v, travels on a smooth track while filling with rain. Which statement about its motion is correct?

a)

The speed remains unchanged because the impulse of the rain is on the y-axis but the velocity is on the x-axis.

b)

The speed increases because the impulse the momentum of the rain plus the momentum of the train are summative.

c)

The speed decreases because the mass of the rail car increases so the velocity must decrease for momentum to be conserved.

17.

The two boxes are sliding along a frictionless surface. They collide and stick together. Afterward, the velocity of the

two boxes is

a)

2 m/s to the left

b)

1 m/s to the left

c)

0 m/s, at rest

d)

2 m/s to the right

e)

1 m/s to the right

18.

Which of the Following Statements Is Not True About Applying the Impulse-Momentum Principle to Two-Dimensional Collisions?

a)

If the impulse is zero, the magnitude of the system’s initial momentum equals the magnitude of its final momentum.

b)

If the impulse is zero, the system’s initial momentum along the x-axis equals its final momentum along the x-axis.

c)

If the impulse is zero, the system’s initial momentum along the y-axis equals its final momentum along the y-axis.

19.

Two Carts Travel Toward Each Other on a Frictionless Track at the Same Speed and Collide with Each Other. One of the Carts Has a Mass Five Times That of the Other Cart. Which Cart Experiences the Greater Change in Momentum?

a)

The smaller cart experiences greater change in momentum.

b)

The larger cart experiences greater change in momentum.

c)

They have the same change in momentum.

d)

It depends on the final speed of the carts.

20.

a)

A

b)

B

c)

C

d)

D

21.

a)

A

b)

B

c)

C

d)

D

22.

a)

A

b)

B

c)

C

d)

D

23.

a)

A

b)

B

c)

C

d)

D

e)

E

24.

a)

A

b)

B

c)

C

d)

D

25.

An impulse depends on

a)

weight and force

b)

force and time

c)

electric charge and time

d)

none of these

26.
Kinetic Energy is defined as
a)
Energy stored due to its location
b)
Energy of motion
c)
Energy stored in the bonds of molecules
d)
Heat energy
27.
You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, what type of energy does it have?
a)
Potential Energy
b)
Kinetic Energy
c)
Nuclear Energy
d)
Chemical Energy
28.

The unit for energy and work is

a)

J

b)

N

c)

m/s

d)

m/s/s

29.
A 5 kg ball is lifted 12 m above the ground. It's gravitational potential energy is
a)
60 J
b)
600 J
c)
17 J
d)
2.4 J
30.
The law of conservation states that
a)
every action has an equal and opposite reaction
b)
all matter has thermal energy
c)
energy cannot be created or destroyed, only changes form
d)
heat moves from an object of higher temperature to an object of lower temperature
31.
The ability to do work is called
a)
energy
b)
thermal
c)
kinetic
d)
potential
32.
Mechanical energy can be either potential or ________.
a)
Motion
b)
Kinetic
c)
Chemical
d)
Light
33.
Which position has the most kinetic energy?
a)
A
b)
G
c)
D
d)
B
34.
Which position has the most potential energy?
a)
A
b)
G
c)
C
d)
D
35.
A pendulum is released from point C.  Which statement is correct as it  swings from C to A?
a)
The PE increases and KE decreases
b)
The KE increases and PE decreases.
c)
The PE is maximum at A.
d)
The KE is maximum at C and B.
36.
Which of the following is an example of a transformation of potential energy to kinetic energy?
a)
a truck slowing down
b)
a car climbing up a hill
c)
an airplane traveling at constant speed
d)
falling object
37.
How are work and energy related? 
a)
The work done by an external force acting on an object causes a change in the mechanical energy of the object.
b)
Work is the same thing as energy.  They are equal. 
c)
Energy is m*g*h, and work is 1/2*m*v2
38.
A 40 kg crate is picked up by a crane to a height of 50m. The crate falls. What is the velocity of the crate just before it hits the ground?
a)
2000 Joules
b)
19,600 Joules
c)
19,600 m/s
d)
31.3 m/s
39.
When my velocity triples, my kinetic energy increases by ______ times.
a)
9
b)
 3 
c)
1.5
d)
4.5
40.
When a 65 kg skydiver jumps from a plane, her speed steadily increases until air resistance provides a force that balances the force due to free fall.  How fast is the skydiver falling if her kinetic energy at the moment is 704000J?
a)
21661.53 m/s
b)
147.17 m/s
c)
22880.0 km/s
d)
10830.76 m/s
41.
At which point(s) on the roller coaster is the gravitational potential energy at its maximum?
a)
A
b)
B
c)
C
d)
D
42.
At which point(s) on the roller coaster is the kinetic energy at its maximum?
a)
A
b)
B
c)
C
d)
D
43.
In diagram 2, if the mass of the car is 600 kg, what is the change in potential energy from point A to point B?
a)
411,600 J
b)
294,000
c)
176,400 J
d)
117,600 J
44.
In diagram 2, if the 600 kg cart is initially at rest, what is its velocity at point B?
a)
19.8 m/s
b)
15.0 m/s
c)
10.3 m/s
d)
3.8 m/s
45.

1. A ball has a 17 J of kinetic energy and its mechanical energy is 25 J. If the ball has a mass of 3.2 kg, what is its height above the ground?

a)

0.26 m

b)

0.52 m

c)

5.2 m

d)

25 m

46.
What is mechanical energy?
a)
It is what metal creates when heated.
b)
All potential and kinetic energy in a system.
c)
It is motion of all matter.
d)
Energy of momentum.
47.
What type of energy is in this picture?
a)
Kinetic
b)
Potential
c)
Chemical
d)
Sound
48.
Energy of motion is which type of energy?
a)
Potential
b)
Kinetic
c)
Sound
d)
Gravitational
49.
What force ultimately slows the roller coaster to a stop?
a)
Applied
b)
Normal
c)
Friction
d)
Magnetic
50.
On a roller coaster, where is maximum potential energy?
a)
At the bottom of a big hill
b)
When going around a corner
c)
When going upside down
d)
At the top of a big hill
51.

A(n) (a)   is a back-and-forth motion of an object between two points of deformation

52.

Periodic motion is repetitious oscillations.

(a)  

53.

The period (T) is the time for one oscillation to occur.

(a)  

54.

The frequency (f) is the number of oscillations per unit of time. The inverse of the period.

(a)  

55.

F=−kxF=-kx

(a)  

56.

U=12kx2U=\frac{1}{2}kx^2 . No capital letters

(a)  

57.

When we're talking about a pendulum, what does T stand for?

a)

pi

b)

period

c)

length

d)

gravity

58.

What is the unit for the period of a pendulum?

a)

second

b)

meter

c)

m/s/s

d)

Newton

59.

As a pendulum gets longer, what happens to the period?

a)

doesn't change

b)

decreases

c)

increases

60.

At what point in the swing of a pendulum is the bob moving fastest?

a)

at the top of the arc

b)

at the bottom of the arc

61.

Which of these does not affect the period of a pendulum?

a)

length

b)

gravity

c)

mass

62.

Which would have the longest period? Pendulum A: A 200-g mass attached to a 1.0-m length string Pendulum B: A 400-g mass attached to a 0.5-m length string

a)

A

b)

B

c)

Same

63.

When does the mass move at maximum velocity in a mass-spring system?

a)

At equilibrium

b)

At the farthest point from equilibrium

c)

At its highest point

d)

At its lowest point

64.

What are the two requirements for a simple harmonic oscillator?

a)

The object vibrates about the equilibrium point and the restoring force is proportional to the displacement

b)

The object moves left to right and the restoring force is proportional to the displacement

c)

The object vibrates about the equilibrium and the restoring force is greater than the displacement

d)

The object moves left to right and the restoring force is greater than the displacement

65.

When does the mass move at 0 velocity in a mass-spring system?

a)

At equilibrium

b)

At the farthest point from equilibrium

c)

At its highest point

d)

At its lowest point

66.

What factor primarily determines the frequency of a mass-spring system?

a)

The mass of the object

b)

The spring constant

c)

Gravity

d)

The amplitude of oscillation

67.

How does the amplitude of a pendulum's swing affect its period?

a)

The period increases with larger amplitudes

b)

The period decreases with larger amplitudes

c)

The period does not change with amplitude

d)

The period doubles with every increase in amplitude

68.

What is the effect of air resistance on the period of a pendulum?

a)

It increases the period

b)

It decreases the period

c)

It has no effect on the period

d)

It initially decreases then increases the period over time

69.

An ant of mass m clings to the rim of a flywheel of radius r, as shown above. The flywheel rotates clockwise on a horizontal shaft S with constant angular velocity 𝜔 . As the wheel rotates, the ant revolves past the stationary points I, II, III, and IV. The ant can adhere to the wheel with a force much greater than its own weight.

It will be most difficult for the ant to adhere to the wheel as it revolves past which of the four points?

a)

I

b)

II

c)

III

d)

IV

e)

It will be equally difficult for the ant to adhere to the wheel at all points.

70.

Four round objects of equal mass and radius roll without slipping along a horizontal surface that then bends upward and backward into an arc of half a circle. The objects all have the same linear speed initially. The objects are a hollow cylinder, a solid cylinder, a solid sphere, and a hollow sphere. The objects to go up the arc and exit the arc going in the opposite direction they entered without falling off the arc. Now, several trials are run for each object. For each trial, the initial speed of the object is reduced until the object does not make it through the full arc. The speed needed for each object to just make it through the arc is recorded. Which of the following correctly lists the objects in order from fastest to slowest speed needed to make it through the arc?

a)

Hollow cylinder, hollow sphere, solid cylinder, solid sphere

b)

Hollow cylinder, solid sphere, solid cylinder, hollow sphere

c)

Solid sphere, solid cylinder, hollow sphere, hollow cylinder

d)

Solid sphere, hollow sphere, solid cylinder, hollow cylinder

e)

Hollow sphere, solid cylinder, hollow cylinder, solid sphere

71.

A small solid sphere is released from rest at the top of an inclined plane as shown. The sphere rolls down without slipping and reaches the bottom of the plane. How would the angular momentum of the sphere at the bottom of the plane change if the coefficient of static friction between the sphere and the plane were increased?

a)

It would decrease because the force of friction would be greater.

b)

It would decrease because the net torque would be larger.

c)

It would increase because the angular acceleration would increase.

d)

It would increase because the linear acceleration would increase.

e)

It would remain the same because the net torque would remain the same.

72.

A spool is made of two circular disks connected to the ends of a cylinder so that the centers of the disks and the cylinder are aligned. In the figure above, the cylinder is shown as the dashed circle, and the disk on one end of the cylinder is shown as the larger solid circle. The spool is at rest on a level horizontal surface. A string attached to the cylinder is pulled gently so that the spool can rotate without slipping on the surface at point P. A force F

is pulled in the direction of arrow d

, and the spool spins but does not roll across the table. If the string is pulled with a force of 2F

, which of the directions indicated, if any, indicates a pull on the string that will cause the spool to spin but not roll across the table?

a)

a

b)

b

c)

c

d)

d

e)

The spool will roll on the table for all four directions shown

73.

A motor drives a shaft of radius R/8 that is attached to the center of a wheel of radius R. The motor is turned off, and the force that the motor exerts on the shaft, Fmotor, varies with time, as shown. There is also a constant friction force of 0.4N applied to the rim of the wheel in the opposite direction of the motion. During which time interval does the rotational kinetic energy increase and then decrease?

a)

From t = 0 s to t = 1 s

b)

From t = 1 s to t = 3 s

c)

From t = 3 s to t = 5 s

d)

From t = 5 s to t = 7 s

e)

From t = 7 s to t = 8 s

74.

Given the graph above of angular acceleration versus time for a rigid body rotating about a fixed axis, which segment of the graph represents the time interval during which the largest magnitude of net torque is exerted on the rigid body?

a)

Segment A

b)

Segment B

c)

Segment C

d)

Segment D

e)

Segment E

75.

An ant of mass m clings to the rim of a flywheel of radius r, as shown above. The flywheel rotates clockwise on a horizontal shaft S with constant angular velocity 𝜔 . As the wheel rotates, the ant revolves past the stationary points I, II, III, and IV. The ant can adhere to the wheel with a force much greater than its own weight.

What is the magnitude of the minimum adhesion force necessary for the ant to stay on the flywheel at point III?

a)

mg

b)

m𝜔2r2

c)

m𝜔2r2 + mg

d)

m𝜔2r - mg

e)

m𝜔2r + mg

76.

A particle of mass m moves counterclockwise around a horizontal circle of radius r, as shown above. The angular speed of the particle is given as a function of time t by ω (t) = bt , where b is a positive constant and t ≥ 0.

What is the magnitude of the angular momentum of the particle about the center of the circle as a function of time?

a)

mbt/r

b)

mbrt

c)

mbr2t

d)

mbr2rt2

e)

mb2r2t2

77.

A solid disk of mass M and radius R is freely rotating horizontally in a counterclockwise direction with angular speed ω about a vertical axis through its center with negligible friction. The rotational inertia of the disk is MR2/2. A second identical disk is at rest and suspended above the first disk with the centers of the two disks aligned, as shown in the figure above. There is no contact between the disks. The second disk is dropped onto the first disk, and after a short time they rotate counterclockwise with the same angular speed ωf.

The two disks are now shifted so that the axis of rotation goes through a point on the edge of the disks. The rotational inertia of the two-disk system is now

a)

2MR2

b)

3MR2

c)

4MR2

d)

5MR2

e)

10MR2

78.

The rotational inertia of a sphere of mass M and radius R about a diameter is 2/5 MR2. The rotational inertia about an axis tangent to the sphere is

a)

3/2 MR2

b)

7/5 MR2

c)

MR2

d)

1/2 MR2

e)

2/5 MR2

79.

A uniform ladder of weight W leans without slipping against a wall making an angle 𝜽 with a floor as shown above. There is friction between the ladder and the floor, but the friction between the ladder and the wall is negligible.

The magnitude of the friction force exerted on the ladder by the floor is

a)

2W tan𝜽

b)

W

c)

W.cot𝜽

d)

W/2

e)

W/2 cot𝜽

80.

A solid cylinder of mass m and radius R has a string wound around it. A person holding the string pulls it vertically upward, as shown above, such that the cylinder is suspended in midair for a brief time interval Δt and its center of mass does not move. The tension in the string is T, and the rotational inertia of the cylinder about its axis is 1/2 mR2. The linear acceleration of the person's hand during the time interval Δt is

a)

(T - mg)/m

b)

2g

c)

g/2

d)

T/m

e)

zero

81.

A wheel of radius R is fixed to an axle of radius R/3 and rotates at constant angular speed ω , as shown in the figure above. A force of magnitude F1 is applied tangent to the outer edge of the wheel. A second force of magnitude F2 is applied tangent to the edge of the axle to keep the wheel rotating at constant angular speed ω. The magnitude F2 is equal to

a)

F1/9

b)

F1/3

c)

F1

d)

3F1

e)

9F1

82.

A disk-shaped platform has a known rotational inertia ID. The platform is mounted on a fixed axle and rotates in a horizontal plane with an initial angular velocity of ωD in the counterclockwise direction, as shown. After an unknown time interval, the disk comes to rest. A single point on the disk revolves around the center axle hundreds of times before the disk comes to rest. Frictional forces are considered to be constant.


A student must determine the angular impulse that frictional forces exert on the disk from the moment it rotates with angular velocity in the counterclockwise direction until it stops. What additional data, if any, should a student collect to determine the angular impulse on the disk? Justify your selection.

a)

The time interval in which the net torque is applied, because a net torque is not exerted on the disk at a single instant in time.

b)

The net torque exerted on the disk, because a net torque is responsible for an angular impulse.

c)

The force of friction exerted on the disk, because a force component perpendicular to the line connecting the axis of rotation and the point of application of the force results in a torque about that axis.

d)

No additional data are necessary, because the rotational inertia of the disk and its initial angular velocity are known.

83.

A disk-shaped platform has a known rotational inertia ID. The platform is mounted on a fixed axle and rotates in a horizontal plane with an initial angular velocity of ωD in the counterclockwise direction, as shown. After an unknown time interval, the disk comes to rest. A single point on the disk revolves around the center axle hundreds of times before the disk comes to rest. Frictional forces are considered to be constant.


A student must determine the angular impulse that frictional forces exert on the disk from the moment it rotates with angular velocity ωD in the counterclockwise direction until it stops. Which of the following could the student have used in order to approximate the initial angular velocity of the rotating disk?

a)

A motion sensor to collect data about the disk’s linear position as a function of time after the disk was set into motion

b)

A motion sensor to collect data about the disk’s angular position as a function of time after the disk was set into motion

c)

A slow-motion camera that filmed the disk to determine the amount of time it took a particular point on the disk to make its first revolution after the disk was set into motion

d)

A stopwatch to determine the amount of time it took a particular point on the disk to make all of its revolutions from the instant in time when the disk was set into motion to the instant in time when the disk came to rest

84.

A ball of mass M swings in a horizontal circle at the end of a string of radius R at an initial tangential speed v0 as it undergoes uniform centripetal motion. A student gradually pulls the string inward such that the radius of the circle decreases, as shown in the figure.


Which of the following predictions is correct regarding the angular momentum and rotational inertia of the ball about the axis of revolution as the ball is pulled inward?

a)

The angular momentum of the ball increases. The rotational inertia of the ball about the axis of revolution decreases.

b)

The angular momentum of the ball increases. The rotational inertia of the ball about the axis of revolution stays the same.

c)

The angular momentum of the ball remains constant. The rotational inertia of the ball about the axis of revolution decreases.

d)

The angular momentum of the ball remains constant. The rotational inertia of the ball about the axis of revolution stays the same.

85.

A horizontal disk of radius 0.2m and mass 0.3kg is mounted on a central vertical axle so that a student can study the relationship between net torque and change in angular momentum of the disk. In the experiment, the student uses a force probe to collect data pertaining to the net torque exerted on the edge of the disk as a function of time, as shown in the graph. The disk is initially at rest. At what instant in time does the disk have the greatest angular momentum?

a)

0.00 s

b)

1.00 s

c)

1.75 s

d)

2.50 s

86.

The rotational inertia of an object is greater when most of the mass is located

a)

on the rotational axis

b)

near the center

c)

away from the rotational axis

d)

it doesn't matter where the mass is

87.

For round objects rolling on an incline, the faster objects are generally those with the

a)

highest center of gravity

b)

lowest rotational inertia compared with mass

c)

greatest rotational inertia compared with mass

d)

most streamlining

88.

For an object traveling in a circular path, its angular momentum doubles when its linear speed

a)

and its radius remain the same and its mass doubles

b)

doubles and its radius remains the same

c)

remains the same and its radius doubles

d)

all of the above

89.
A state of equilibrium is also seen below. Each of the cars weighs the same  9800 N. Despite the fact that there is only one car on the left-hand side that is 9 m from the fulcrum, the torques balance because, the car on the left-hand side, is ____meters from the fulcrum, compared to the cars on the right-hand side.
a)
4.5 m
b)
3 m
c)
1 m
d)
2 m
90.
A seesaw is unbalanced with two people of different masses sitting equal distances from the center. Which of the following will result in equilibrium?
a)
The larger person moving further away from the center.
b)
Moving the smaller person closer to the center.
c)
Moving the smaller person further from the center.
d)
Making the larger person do nothing.
91.
A wrench is used to tighten a nut. A 15N perpendicular force is applied 50cm away from the axis of rotation, and moves a distance of 10 cm as it turns. What is the torque applied to the wrench?
a)
7.5 Nm
b)
1.5 Nm
c)
750 Nm
d)
150 Nm
92.
In the diagram above, two masses, one with mass m, the other with mass M = 2m are resting on a uniform plank of length L that pivots at its midpoint. If the mass m is at the far end of the plank, how far away from the pivot should the mass M be to balance the plank in a horizontal position shown?
a)
L/2
b)
L/3
c)
L/4
d)
L/6
93.
When an object is experiencing a net torque
a)
it is in dynamic equilibrium.
b)
it is in static equilibrium.
c)
it is rotating.
d)
it is translating.
94.
What force does not cause any torque?
a)
Force perpendicular to the fulcrum, and not on the fulcrum
b)
Force parallel to the fulcrum, and not on the fulcrum
c)
Force perpendicular to the fulcrum, and slightly off center of the fulcrum
d)
Forces at a 45 degree angle to the fulcrum, and not on the fulcrum
95.
Does a bridge anchored resting on two pillars have any torque?
a)
No, it isn't moving
b)
Yes, but it is at equilibrium
c)
Yes, but it will soon break because of the torque
d)
No, Bridges can't have torque
96.
The center of mass is:
a)
the exact middle
b)
the heaviest part
c)
the point at which you can balance with one finger
d)
the idea that mass is concentrated throughout
97.

The figure above shows a uniform meterstick that is set on a fulcrum at its center. A force of magnitude F toward the bottom of the page is exerted on the meterstick at the position shown. At which of the labeled positions must an upward force of magnitude 2F be exerted on the meterstick to keep the meterstick in equilibrium?

a)

A

b)

B

c)

C

d)

D

98.
What is the center of mass?
a)
An imaginary point
b)
The average location of all of the mass in an object
c)
The balancing point of an object
d)
All of these!
99.
The torque of the right side of this broom is ---- the left side.
a)
more than
b)
less than
c)
equal to
d)
None of the above
100.
the mass of the right side is ------ compared to the left side.
a)
more
b)
less
c)
equal
d)
None of the above
101.
What is the distance the masses on the right of the fulcrum need to be to balance with the two masses on the left?
a)
.65 m
b)
.56 m
c)
.79 m
d)
.39 m
102.
What direction is the torque acting with respect to post A?
a)
clockwise
b)
Counter clockwise
c)
Neither Direction
d)
Depends on the mass of the diver
103.

"A point at which entire weight of object concentrated toward the earth".


Identify the concept explained in the statement above.

a)

Free body diagram

b)

Concurrent forces

c)

Centre of gravity

d)

Rigid body

104.
If the center of gravity of an object is above the area of support, the object will remain upright. 
a)
True
b)
False
105.
A mobile is shown in the figure. The horizontal supports have negligible mass. Assume that all the numbers given in the figure are accurate to two significant figures. What mass M is required to balance the mobile?
a)
36 g
b)
90 g
c)
18 g
d)
60 g
106.
A uniform rod weighs 40 N and is 1.0 m long. It is hinged to a wall at the left end, and held in a horizontal position at the right end by a vertical string of negligible weight, as shown in the figure. What is the magnitude of the torque due to the string about a horizontal axis that passes through the hinge and is perpendicular to the rod? The hinge is very small with negligible friction.
a)
5.0 N ∙ m
b)
20 N ∙ m
c)
10 N ∙ m
d)
40 N ∙ m
107.
To determine the location of the center of mass (or center of gravity) of a car, the car is driven over a scale on a horizontal floor. When the front wheels are over the scale, the weight recorded by the scale is 5800 N, and when the rear wheels are over the scale, the scale reads 6500 N. The distance between the front and rear wheels is measured to be 3.20 m. How far behind the front wheels is the center of mass located?
a)
1.69 m
b)
0.845 m
c)
1.72 m
d)
1.50 m
108.
A 15-kg child is sitting on a playground teeter-totter, 1.5 m from the pivot. What is the magnitude of the minimum force, applied 0.30 m on the other side of the pivot, that is needed to make the child lift off the ground?
a)
66 N
b)
740 N
c)
23 N
d)
44 N

Similar Resources on Wayground

Form 5 Chp 2 Electricity

103 questions

Form 5 Chp 2 Electricity

quiz

Worksheet

•

KG - University

PS Midterm Review

111 questions

PS Midterm Review

quiz

Worksheet

•

9th Grade

ICP Pretest

111 questions

ICP Pretest

quiz

Worksheet

•

9th - 11th Grade

STAAR Review

108 questions

STAAR Review

quiz

Worksheet

•

KG - University

Midterm Review Quizizz

109 questions

Midterm Review Quizizz

quiz

Worksheet

•

9th - 12th Grade

HPS Unit 7 & 8 Review

106 questions

HPS Unit 7 & 8 Review

quiz

Worksheet

•

9th - 12th Grade

Physical Science Final Exam Review Part 1

108 questions

Physical Science Final Exam Review Part 1

quiz

Worksheet

•

9th - 12th Grade

Physical Sci. Sem1 Final Exam 2026

104 questions

Physical Sci. Sem1 Final Exam 2026

quiz

Worksheet

•

9th Grade